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RISA Comparison of a Numerical Model and an Approximate Analytical Model of the Growth of Snowflakes
Publisher: American Meteorological Society
Abstract: A comparison is made between the evolution of initially exponential snowflake size distributions growing by deposition and aggregation as calculated with a numerical model and with the approximate analytical model of ...
Collision Efficiency and Cloud Drop Spectrum Evolution
Publisher: American Meteorological Society
Abstract: The variation in the evolution of a cloud droplet spectrum with collision efficiency is examined for sets of efficiencies based on different fluid mechanical models. The results indicate that the variation of collision ...
Narrowband to Broadband Conversion with Spatially Autocorrelated Reflectance Measurements
Publisher: American Meteorological Society
Abstract: A new technique for estimating broadband reflectance from Advanced Very High-Resolution Radiometer (AVHRR) narrowband reflectances in channel 1 and 2 is developed. The data used are simultaneous and coincident narrowband ...
The Effect of Turbulence on the Collision Rates of Small Cloud Drops
Publisher: American Meteorological Society
Abstract: The significance of the influence of turbulence on collisions and coalescence of small cloud droplets is still an outstanding problem. In particular, the growth of droplets in the radius range 10 to 15 µm is not well ...
A New Parameterization for the Determination of Solar Flux Absorbed at the Surface from Satellite Measurements
Publisher: American Meteorological Society
Abstract: An earlier parameterization that relates the outgoing solar flux at the top of the atmosphere to the flux absorbed at the surface is modified and extended to allow for variations in atmospheric properties that were not ...
Droplet Growth by Condensation and Coalescence in a Strong Updraft
Publisher: American Meteorological Society
Abstract: The growth of cloud droplets by condensation and coalescence in a strong updraft is investigated for different cloud conditions and different initial droplet distributions. Growth by coalescence is determined by solving ...
Estimation of SW Flux Absorbed at the Surface from TOA Reflected Flux
Publisher: American Meteorological Society
Abstract: Measurements of radiation budgets, both at the top of the atmosphere (TOA) and at the surface, are essential to understanding the earth's climate. The TOA budgets can, in principle, be measured directly from satellites, ...
A Comparison of Several Radiometric Methods of Deducing Path-Integrated Cloud Liquid Water
Publisher: American Meteorological Society
Abstract: Using radiometer data collected during the Canadian Atlantic Storms Program, we have investigated five different methods of estimating the path-integrated, or columnar, cloud liquid water. The methods consist of one- and ...
The Mackenzie GEWEX Study: The Water and Energy Cycles of a Major North American River Basin
Publisher: American Meteorological Society
Abstract: The Mackenzie River is the largest North American source of freshwater for the Arctic Ocean. This basin is subjected to wide fluctuations in its climate and it is currently experiencing a pronounced warming trend. As a ...
Energy and Water Cycles in a High-Latitude, North-Flowing River System
Publisher: American Meteorological Society
Abstract: The MacKenzie Global Energy and Water Cycle Experiment (GEWEX) Study, Phase 1, seeks to improve understanding of energy and water cycling in the Mackenzie River basin (MRB) and to initiate and test atmospheric, hydrologic, ...